Flash Rocks - Light Up When Struck Together

Flash Rocks - Light Up When Struck Together

Bored? Why not sit around and strike these mysteriously cool Flash Rocks together. When struck together a bright flash of light occurs at the point of impact, a phenomena known as Triboluminescence. That's all they really do, but at least you won't need to buy any batteries! You get 3 pairs of these strange rocks for you and your coworkers to play with.